Description

The AD8139ARDZ is an ultralow noise, high performance differential amplifier with rail-to-rail output. It is ideal for driving ADCs with resolutions to 18 bits due to its low noise, high SFDR, and wide bandwidth. The AD8139 is easy to apply, and its internal common-mode feedback architecture allows its output common-mode voltage to be controlled by the voltage applied to one pin. The internal feedback loop also provides outstanding output balance as well as suppression of even-order harmonic distortion products. Fully differential and single-ended-to-differential gain configurations are easily realized by the AD8139. Simple external feedback networks consisting of four resistors determine the closed-loop gain of the amplifier.

Specifications and features

• Fully differential
• Low noise: 2.25 nV/√Hz, 2.1 pA/√Hz
• Low harmonic distortion: 98 dBc SFDR @ 1 MHz, 85 dBc SFDR @ 5 MHz, 72 dBc SFDR @ 20 MHz
• High speed: 410 MHz, 3 dB BW (G = 1), 800 V/μs slew rate, 45 ns settling time to 0.01%
• Output balance: 69 dB @ 1 MHz
• DC CMRR: 80 dB
• Low offset: ±0.5 mV maximum
• Low input offset current: 0.5 μA maximum
• Differential input and output
• Rail-to-rail output
• Adjustable output common-mode voltage
• Wide supply voltage range: 5 V to 12 V
• Available in a small SOIC package and an 8-lead LFCSP

Application Scenarios

The AD8139ARDZ is suitable for use in a variety of applications including ADC drivers to 18 bits, single-ended-to-differential converters, differential filters, level shifters, differential PCB drivers, and differential cable drivers.

Comparison

• Ultralow noise
• High SFDR
• Wide bandwidth
• Easy to apply
• Outstanding output balance and suppression of even-order harmonic distortion products
• Flexible differential or single-ended-to-differential configurations
• Adjustable output common-mode voltage
• Rail-to-rail output
• Wide supply voltage range
• Available in small SOIC package and an 8-lead LFCSP

• No significant disadvantages were found on this product.